I wonder when 7-Zip will reach Final? And surely the version numbering system is outdated, because I thought it changed from 4.xx to 9.xx to represent 2009? I thought it would have migrated to represent 2010?

Checked the change log and noticed it's been in Beta since 2009-05-30.

I don't understand all these beta releases... I stopped upgrading at v9.15.

What's new:

- Disk fragmentation problem for ZIP archives created by 7-Zip was fixed.
- Notes: 7-Zip now uses 4 MB RAM buffer as file cache, when you create ZIP archives. It reduces the number of Move_File_Position and Write_to_File operations.

I don't understand all these beta releases... I stopped upgrading at v9.15.

What's new:

- Disk fragmentation problem for ZIP archives created by 7-Zip was fixed.
- Notes: 7-Zip now uses 4 MB RAM buffer as file cache, when you create ZIP archives. It reduces the number of Move_File_Position and Write_to_File operations.

It seems Igor Pavlov wants 7-zip 9 to be extremely stable when a final version is released. I don't update the components of Universal Extractor myself, Lupo73's unofficial revisions make life much easier.

@Checker: You're amazingly fast. Your post has a timestamp of 21 minutes before the official release of 7-zip 9.17 beta: